package com.imu.aop.config;

import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;

@Configuration
public class WebMvcConfig extends WebMvcConfigurationSupport {
    @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
//        创建消息转换器对象
        MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();
//        设置对象转换器，底层使用Jackson将java对象转换为Json
        messageConverter.setObjectMapper(new JacksonObjectMapper());
//        将创建的消息转换器添加到mvc框架的转换器集合中
        converters.add(0,messageConverter);
    }
}
